Stainless Steel Grade AISI 317L | EN 1.4438 | DIN X2CrNiMo-18-16-4

AISI 317L / EN 1.4438 / DIN X2CrNiMo-18-16-4 is a low-carbon austenitic stainless steel. The combination of chromium, nickel and molybdenum increases corrosion resistance, improves resistance to sulfuric, acetic, formic acids, chemical resistance to citric and tartaric acids.

Due to its low carbon content, it is also resistant to welding sensitization and has high creep, tensile strength and high temperature tensile strength. It is non-magnetic when annealed, but may become slightly magnetic after welding.

Physical properties

Table No. 1: physical properties of stainless steel grade AISI 317L | EN 1.4438 | DIN X2CrNiMo-18-16-4
Density g/cm³	7,91
*Specific heat capacity at +20°C, J/kgK**	500
*Thermal conductivity at +20°C, W/mK**	14
*Specific electrical resistance at +20°C, μOhmm**	0,85
Magnetic properties	non-magnetic

Table No. 2: physical properties of stainless steel grade AISI 317L | EN 1.4438 | DIN X2CrNiMo-18-16-4
Temperature	+20°С	+100°С	+200°C	+300°С	+400°С	+500°С
Modulus of elasticity, GPa	200	194	186	179	172	165
Coefficient of linear expansion, 10^-6/°C	16,0	16,0	16,5	17,0	17,5	18,0

Mechanical properties

Table: mechanical properties of stainless steel grade AISI 317L | EN 1.4438 | DIN X2CrNiMo-18-16-4
Tensile strength (MPa)	500 - 700
Yield strength, 0.2%, MPa	200 - 240
Relative elongation, min., %	35 - 40
Brinell hardness, HB max.	215

Table: chemical composition of steel grade AISI 317L | EN 1.4438 | DIN X2CrNiMo-18-16-4
Chemical composition of steel grade AISI 317L \| EN 1.4438 \| DIN X2CrNiMo-18-16-4
C	Si	Mn	P	S	Cr	Mo	Ni	N	Fe
<0,03	<1,0	<2,0	<0,045	<0,015	18,0-20,0	3,0-4,0	13,0 - 16,0	<0,11	Other

AISI 317L / EN 1.4438 austenitic stainless steel, used in the production of heat exchangers, pipelines, valves, fittings (stainless steel elbows), radiator and pump parts, connectors, tanks for chemical compounds, bolts and nuts. It is used in the chemical, petrochemical, food, oil refining, cryogenic and paper industries. The steel is very resistant to intercrystalline corrosion.